Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
DRAINED THROUGH THE HOSE
Changing the oil in a car engine is one of the dirtiest operations. Judge for yourself — when warmed to 80-90 degrees engine merges dirty testing, her hot stream enters anywhere, but not...
ON THE ROAD – AUTOPARATOPY
For ten years the laboratory simulation of young technicians station in Rostov-na-Donu spends on the road forty-meter competitions. They involve teams of clubs children's clubs when...
